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Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of summary of significant accounting policies [line items] |  |  |
Impairment loss | $ 0 | $ 0 | $ 0
Useful lives of property and equipment |  | The Company concluded that airframe and engines are now expected to remain in operation for 27 years from the purchase date. As consequence the expected useful life of the fleet decreased by 3 years. |
Applicable tax rate | 25.00% | 25.00% | 25.00%
Panama [member] |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |
Applicable tax rate | 25.00% |  |
Dividends Tax Rate, Panamanian source income | 10.00% |  |
Dividends Tax Rate, foreign source income | 5.00% |  |
Bottom of range [member] | Computer software licenses [member] |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |
Estimated useful lives | 3 years |  |
Bottom of range [member] | Software development [member] |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |
Estimated useful lives | 5 years |  |
Bottom of range [member] | Computer software development [member] |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |
Estimated useful lives | 3 years |  |
Top of range [member] | Computer software licenses [member] |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |
Estimated useful lives | 8 years |  |
Top of range [member] | Software development [member] |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |
Estimated useful lives | 15 years |  |
Top of range [member] | Computer software development [member] |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |
Estimated useful lives | 5 years |  |

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